A proton moving along the x axis has an initial velocity of 4.0 × 10^6 m/s and a constant acceleration of 6.0 × 10^12 m/s2 . What is the velocity of the proton after it has traveled a distance of 80 cm?
a. 5.1 × 10^6 m/s
b. 6.3 × 10^6 m/s
c. 4.8 × 10^6 m/s
d. 3.9 × 10^6 m/s
e. 2.9 × 10^6 m/s
a
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Compared to spiral galaxies, elliptical galaxies have
A. ...more gas, more dust, and less new star formation. B. ...less gas, more dust, and more new star formation. C. ...less gas, less dust, and more new star formation. D. ...more gas, more dust, and more new star formation. E. ...less gas, less dust, and less new star formation.
The process whereby heat flows in the absence of any medium is referred to as
A) conduction. B) convection. C) radiation. D) inversion. E) evaporation.
A negatively-charged balloon touching a wooden wall
A) pulls positive charge on the wall surface toward it. B) pushes negative charge in the wall away from it. C) polarizes molecules in the wall. D) all of the above E) none of the above
A magnetic field of 2.00 T is applied to a bubble chamber to make the tracks of protons and other charged particles identifiable by the radius of the circles they move in. If a high-energy proton moves along an arc of a 3.30-m circle, what is the momentum of the proton? [q = 1.60 × 10^-19 C, m = 1.67 × 10^-27 kg]